New York's natural gas drillers should pay into a fund to cover any cleanups or accidents, the state comptroller said on Tuesday, ahead of the state's plan to review drilling applications next year

New York City wants to catch and store rainwater temporarily in new roof systems to stop heavy storms sending sewage spilling into city waterways.

The catchment systems would consist of "blue" roofs that have a series of drainage pools and "green" or grass- or ivy-covered roofs, under a plan unveiled by Mayor Michael Bloomberg.

Bloomberg estimates the city could save $2.4 billion over 20 yea