US, Canada and Mexico sign clean energy pact

Canada, Mexico and the United States signed a draft agreement Friday to curb greenhouse gas emissions while increasing their energy interdependence.

Filling in gaps in the history of earth's magnetic field

Boulder, Colo., The Marcellus Shale is famous as a formation being explored for natural gas resources. That exploration has also offered some insight into an age-old problem: where was the continent of North America 400 million ...

Nitrous oxide from urine patches in pastures

Commonly known as 'laughing gas' and currently used both in anaesthetics and as a 'legal high', nitrous oxide (N2O) is a powerful greenhouse gas produced in the soil by micro-organisms, especially so on land grazed by animals.

EPA: No widespread harm to drinking water from fracking (Update)

Hydraulic fracturing to drill for oil and natural gas has not caused widespread harm to drinking water in the United States, the Environmental Protection Agency said Thursday in a report that also warned of potential contamination ...

What happened to 'Food Miles?'

Some years ago we were being advised to buy UK-grown fresh produce to avoid the 'food miles' associated with importing air-freighted fruit and vegetables due to concerns over how this was contributing to the release of CO2 ...

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