Matthew Pencharz, Boris Johnson's senior advisor for environment and energy, outlines London's achievements at the C40 Cities Summit
China, UK and Germany sign World Bank declaration calling for polluters to pay for costs of climate change
CDP report shows many companies are already incorporating a carbon price into their businesses strategies
Dow Jones Sustainability indices confirms latest rankings for more than 1,800 companies around the world
IT giant reveals $145m equity commitment to new 82MW solar farm in California, completing its 17th renewable energy investment since 2010
Major new study warns world remains on track for 4C warming this century, despite some encouraging progress from renewables industry
Martyn Jones of Alliance Trust Investments reveals how the company has attempted to work out which is the greenest fabric
Jean-Marc Duvoisin explains why the company has committed £330m to tackling climate change and is working with small holders in South Sudan
Advertising Standards Authority raps coal giant over green ad campaign
Standards body publishes new standards for water footprints and sustainable cities, while revealing plans to expand environmental portfolio