This week, flash floods along the Nepal-Tibet border swept through mountain communities, killing scores of people and leaving hundreds missing, a devastating human tragedy still unfolding as rescuers search for survivors. It arrives in a year already marked by extreme weather elsewhere: Europe has endured a series of record-breaking heatwaves, with temperatures topping 40°C across large areas.
Events like these are, first and foremost, human tragedies, and our thoughts are with those affected. They are also part of a wider pattern that is reshaping the world's energy systems, and, with it, one of the biggest long-term themes in investing: the shift toward cleaner energy. This guide looks soberly at the climate backdrop and at how investors approach the green-energy transition, along with the honest risks. It's educational, not investment advice, and it's about a long-term structural trend, not a reaction to any single disaster. If you want to research the sector, you can explore global stocks from just $1 with zero commission on the Nemo.money app.
Investors around the world are searching:
- "Green energy stocks"
- "Renewable energy investing"
- "Solar stocks"
- "Clean energy ETF"
- "Climate change investing"
A Sober Look at the Backdrop
It's important to be careful and accurate about cause and effect. Scientists generally don't attribute any single event solely to climate change; instead, they describe how a warming world makes many extreme events more frequent or more intense.
- 🏔️ Nepal's floods. The immediate trigger this week was reported to be a glacier ice-and-rock avalanche that surged downstream. Researchers note the Himalaya is warming faster than the global average, and that floods, glacial instability and extreme rainfall have become more frequent there, though investigations into this specific event are ongoing.
- 🌡️ Europe's heatwaves. In 2026, western Europe experienced successive record-setting heatwaves from as early as May, with temperatures repeatedly exceeding 40°C. Scientists have cited climate change as a contributing factor to their intensity and earlier onset. Closer to home for many of our readers, the Gulf has seen its own extremes, the UAE recorded its first 50°C reading of 2026 early in August, part of a clear multi-year warming trend we explored in our beginner's guide to green-energy investing.
- 📈 A broader trend. Around the world, heatwaves, droughts, wildfires and extreme rainfall have been growing more common. Whatever any single event's cause, the long-term direction is clear enough that governments, companies and investors are treating it as a structural shift.
This backdrop matters to investors not as a headline, but because it is accelerating a genuine, measurable change in how the world produces and uses energy.
The Energy Shift That's Already Underway
Beneath the alarming headlines is a quieter but profound transformation, and it's showing up in hard data:
- ☀️ Solar's remarkable rise. In June and July 2026, solar supplied around a quarter of the EU's electricity, a record, and during the summer heatwaves record solar output helped keep strained grids stable as demand for air-conditioning surged.
- 🔋 Renewables outpacing coal. According to the International Energy Agency, renewable electricity generation is now growing faster than any other source and has moved ahead of coal, with solar power expanding especially rapidly across many power systems.
- ⚡ Rising demand for electricity. Heatwaves (more air-conditioning), electric vehicles and heat pumps are all pushing electricity demand higher, and much of that new demand is being met by renewables and other low-emission sources.
- 🛠️ The grid needs upgrading. The same events exposing grid strain are driving investment in batteries, storage and grid flexibility, the infrastructure a cleaner system needs.
In short, extreme weather is both a symptom of the problem and, increasingly, an accelerant of the shift toward the solution.
Prominent Voices Who Have Backed Clean Energy
The move toward cleaner energy has drawn support from a wide range of well-known figures, from broadcasters to politicians to investors. It's worth being precise about each, and noting that mentioning someone here is not an endorsement of any particular investment:
- 🎙️ Sir David Attenborough. The veteran naturalist and broadcaster has long been one of the world's most prominent voices on climate change, repeatedly urging world leaders to act and publicly backing a shift to renewable energy.
- 🏛️ Barack Obama. As US president, Obama made clean energy a policy priority, from clean-power regulations to helping bring about the Paris Agreement, and has continued to advocate for climate action since leaving office.
- 💼 Warren Buffett. Buffett's Berkshire Hathaway has invested very large sums (reported at tens of billions of dollars) in wind and solar power through its utility businesses. Notably, Buffett has framed these as sound commercial investments rather than climate advocacy, and Berkshire also retains significant fossil-fuel operations, a useful reminder that even major renewable investment can sit alongside other interests.
The through-line isn't that these figures agree on everything, they don't, but that support for clean energy now spans science communication, public policy and hard-nosed capital allocation.
The Investing Angle: The Green-Energy Transition
For investors, the energy transition is one of the defining long-term themes of the era. (If you're new to the topic, our beginner's guide to green-energy investing walks through the basics, and the AI-driven surge in electricity demand, in more depth.) Here's how people research exposure to it, all examples to research, not recommendations:
- 🌞 Renewable generators and developers. Companies that build and operate solar and wind projects, for example NextEra Energy (NYSE: NEE), one of the world's largest renewable-power utilities, though these can be sensitive to interest rates and project financing.
- 🔧 The "picks and shovels". Makers of solar panels, wind turbines, inverters, batteries and the equipment behind the transition, such as First Solar (NASDAQ: FSLR) and Enphase Energy (NASDAQ: ENPH), plus the miners and materials suppliers that feed it. Many leading turbine and utility names (like Denmark's Vestas or Spain's Iberdrola) are listed overseas and may not be available on every app.
- 🔌 Grids, storage and efficiency. Utilities modernising their networks, battery-storage specialists, and companies improving energy efficiency, often less flashy, but central to the shift.
- 🧺 Clean-energy funds and ETFs. Thematic ETFs bundle many of these companies together, spreading the risk of relying on any single name (all investments still carry risk). Widely-followed examples include the iShares Global Clean Energy ETF (NASDAQ: ICLN), the Invesco Solar ETF (NYSEARCA: TAN) and the First Trust NASDAQ Clean Edge Green Energy ETF (NASDAQ: QCLN). They vary widely in what they hold, and can be volatile, so it's worth checking under the bonnet.
- 🌍 Broad-market and diversified options. Some investors prefer broad index funds that include energy-transition companies alongside everything else, rather than a concentrated thematic bet.
The Honest Risks
Green energy is a powerful long-term theme, but it is far from a guaranteed or smooth investment:
- ⚠️ Policy dependence. The sector is heavily influenced by government subsidies, tax credits and regulation. Changes in policy, in any direction, can significantly affect returns.
- ⚠️ Volatility and past disappointment. Clean-energy stocks and ETFs have been highly volatile, and several boomed and then fell sharply in recent years. Strikingly, the two best-known clean-energy ETFs (ICLN and TAN) both launched back in 2008 and, even after a strong 2025-26 recovery, remain below their original starting levels, a vivid reminder that a great long-term theme doesn't guarantee any given company or fund does well.
- ⚠️ Interest-rate sensitivity. Renewable projects are capital-intensive, so higher interest rates can raise financing costs and weigh on valuations.
- ⚠️ Competition and technology risk. Falling prices are great for adoption but can squeeze manufacturers' margins, and today's leading technology can be overtaken.
- ⚠️ It's a transition, not a switch. Fossil fuels remain a large part of the global energy mix, and the shift will take decades, with plenty of bumps along the way.
The sensible approach is to treat the energy transition as a long-term structural theme to research carefully, judging each company or fund on its fundamentals, valuation and risks, rather than buying a theme on emotion.
How to Research Green-Energy Stocks with Nemo.money
Whether you're interested in solar, wind, storage or a diversified clean-energy fund, the Nemo.money app is built to help you research before you decide:
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Frequently Asked Questions (FAQs)
Is climate change causing events like Nepal's floods and Europe's heatwaves?
Scientists generally avoid attributing any single event solely to climate change. Instead, they explain that a warming world makes many extreme events more frequent or intense. Nepal's flooding this week was reported to be triggered immediately by a glacier avalanche, in a Himalayan region that is warming faster than the global average, while Europe's 2026 heatwaves have been linked by scientists to climate change as a contributing factor. The broader long-term trend of more extreme weather is well established.
How can I invest in green or renewable energy?
Investors research several routes: shares in renewable generators and developers, "picks and shovels" makers of solar panels, turbines and batteries, grid, storage and efficiency companies, and clean-energy ETFs that hold a basket of these firms. Each carries different risks. Apps like Nemo.money let you research and invest in global stocks and ETFs from just $1 with zero commission.
Are green energy stocks a good investment?
Green energy is a significant long-term theme, but that doesn't make any individual stock a good investment. Clean-energy shares and funds have been highly volatile, are sensitive to interest rates and government policy, and several have fallen sharply after booming. A powerful trend and a sensible investment at today's price are not the same thing. Whether any stock suits you depends on your own research and goals.
What is a clean energy ETF?
A clean-energy ETF is a fund that holds shares in many companies linked to renewable energy, such as solar, wind, storage and related technology, letting you get exposure to the theme without betting on a single stock. These ETFs vary widely in what they hold and can be concentrated or volatile, and they carry management fees. This is general information, not advice, and your capital is at risk.
Which well-known people support clean energy?
Support for clean energy spans many fields. Sir David Attenborough has long urged action on climate change and backed renewable energy; Barack Obama prioritised clean energy in US policy and helped bring about the Paris Agreement; and Warren Buffett's Berkshire Hathaway has invested tens of billions in wind and solar through its utilities (though Buffett frames this as commercial rather than activist, and Berkshire retains fossil-fuel operations). Mentioning them is not an endorsement of any investment. This is general information, not advice.
Final Thoughts: A Human Tragedy, and a Structural Shift
The floods in Nepal are, above all, a human tragedy, and no investing discussion should lose sight of that. But the extreme weather making headlines around the world, from the Himalaya to a sweltering Europe, is also part of a backdrop that is steadily transforming the global energy system. Renewables are now growing faster than any other source, solar is setting records, and enormous investment is flowing into cleaner generation, grids and storage.
For investors, the green-energy transition is one of the great long-term themes of our time, but it is not a one-way bet. It is shaped by policy, sensitive to interest rates, and has already delivered painful volatility. The disciplined approach is to understand the structural shift, research each company and fund on its own merits, respect the risks, and take a long-term view, rather than react to any single event. The world's energy system is changing; investing in that change calls for both conviction and care.
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