Around 13 megacities have so far been identified as ABC hotpots. Bangkok, Beijing, Cairo, Dhaka, Karachi, Kolkata, Lagos, Mumbai, New Delhi, Seoul, Shanghai, Shenzhen and Tehran where soot levels are 10 per cent of the total mass of all human-made particles. ABCs can reduce sunlight hitting the Earth's surface in two ways.

Britain decides that climate change is too important to leave to the politicians

The planet could face a freeze worse than an Ice Age starting in as little as 10,000 years, giving future societies a headache the opposite of coping with global warming, scientists said on Wednesday.

The takeover talks between IBM and Sun highlight a shift in the industry

Tropical cyclones may be a tiny help in slowing global warming by washing large amounts of vegetation and soil containing greenhouse gases into the sea, scientists said on Sunday.