New scientific data supports the belief that methane emissions from big hydroelectric dams in the tropics outweigh the benefits that this form of renewable energy provides.

We are in the middle of one of the biggest experiments in human history. At its core is the homogenisation of global food systems, which increasingly must deliver the same products to an expanding population (in all senses) across the world.

Two companies in Japan recently announced they are to begin building two huge solar power islands that will float on reservoirs. This follows Kagoshima solar power plant, the country’s largest, which opened in late 2013 and is found floating in the sea just off the coast of southern Japan.

Despite what appears to be an insurmountable problem, it may be possible to significantly reduce global water scarcity in 35 years.

The Nuclear Energy Institute (NEI) – the corporate lobbyist in Washington, D.C. for the disintegrating atomic power industry – doesn’t have to worry about repercussions from the negative impacts of nuclear power.

The critical links between water, sanitation, and our global consumption of energy – the “energy-water nexus” are more obvious than ever before. But how many of us will take direct action at the most basic level of all?

Economics is largely just organized common sense, and it doesn’t get much more common sense than benefit-cost analysis. Want to decide whether to buy that apple, make that investment or pass that clean air rule? Tally up the benefits. Tally up the costs. If benefits outweigh costs, do it.

During the last two springs, contract planters for The Nature Conservancy have spread out through the pine, spruce and aspen forest of northeastern Minnesota. Wielding steel hoedads, they have planted almost 110,000 tree seedlings on public land.

Signs are hopeful that China, the world’s No.1 emitter of greenhouse gases, aims to become less reliant on the polluting coal that powered its rapid economic rise.

Following President Lázaro Cárdenas’ expropriation of foreign oil company assets in 1938, the oil industry has been a symbol of Mexican sovereignty. This made the state oil firm Petróleos Mexicanos (Pemex) politically untouchable. That is until now.

Bamboo, a common grass which can be harder to pull apart than steel, has the potential to revolutionise building construction throughout the world. But that’s not all. As a raw material found predominantly in the developing world, without a pre-existing industrial infrastructure built to skew things towards the rich world, bamboo has the potential to completely shift international economic relations.

Three weeks before the UN Secretary-General’s extraordinary meeting of world leaders in New York to tackle climate change, a leading British scientist unveils plans for a global low-carbon fund on a par with the Apollo Moon programme.

A less meat-intensive diet is essential for the sake of wildlife and forests and to slow climate change, says a report by UK-based researchers.

Scientists are developing a way to squeeze the last vestiges of value from renewable energy processes by combining their waste products to produce eco-friendly fertilisers that could help slow food price rises.

A number of factors are converging to make hydrogen fuel cell vehicles more attractive to investors and consumers, according to a new report.

A new study says a federal cap-and-trade policy could pay for itself ten times over with health benefits. What if I offered you an investment that would make us all healthier, save thousands of lives, and pay for itself?

As countries build ever more fossil fuel power plants, they commit the atmosphere to rapidly increasing levels of carbon dioxide – the opposite of what governments say they intend.

I believe we have a problem — a big problem. According to demographers, by the end of this century we’ll have around 11 billion mouths to feed. Most of the additional 4 billion people alive then will be in developing nations.

Russia intends to build the first thermal nuclear power plant in Kazakhstan, the world’s largest uranium producer. But where it will be in that vast country and who will own it remain unclear.

A stick-and-carrot approach to persuade Brazil’s cattle farmers to make far more productive use of pasture could reduce up to a quarter of greenhouse gas emissions caused by the loss of precious rainforest, according to new research

European researchers say a 2,000-mile pipeline designed to carry controversial tar sands oil from Canada to the southern US may lead to much more pollution than previously calculated.

Scientists in the US have established that some chemicals used in the controversial process of fracking to extract gas and oil could represent health and environmental hazards.

Toxicologists have a saying: “The dose makes the poison.” In other words, there is no such thing as “toxic” or “non-toxic”—it always depends on how much of a substance you consume.