Yuan Tseh Lee, president of the International Council for Science, tells SciDev.Net what scientists must achieve at Rio+20.

The cities account for more than three quarters of emissions of CO2, are home to half the world population and will be 'highly visible' at Rio +20.

SciDev.Net speaks to UN Environment Programme executive director Achim Steiner at the Eye on Earth Summit (12-15 December) about next year's Rio+20.

Nuclear power promises clean energy for developing countries. Dave Elliott charts its progress and prospects after the accident at Fukushima.

As Japan's nuclear accidents send shockwaves round the world, Alex Abutu explores whether Africa is ready to provide safe nuclear power.

Solar power could help alleviate rural poverty. David J. Grimshaw and Sian Lewis shine a light on its progress, potential and pitfalls.

The continent may have plenty of sun, but some African countries are looking to wind power to meet their energy needs.

Yvo de Boer, the UN climate chief, speaks to SciDev.Net about getting clean technology into the developing world.

Despite Pakistan's stance that mainstreaming renewable energy should be a priority, much remains to be done, reports Syed Fareed Hussain.

New climate change models predict a heavy impact from global warming on Brazil's biodiversity, agriculture and health, reports Helen Mendes.

T.V. Padma looks at how and why greenhouse gas emissions from India are on the rise.

Catherine Brahic reports on how fluctuations in Europe’s emissions market could impede green development in poor countries.