British geo-engineers are proposing the installation of thousands of artificial trees, devices that capture carbon dioxide, in the next 20 years to slow down global warming.

The Institution of Mechanical Engineers (IME) said Thursday the synthetic trees that resemble giant fly swats convert home, car and factory emissions into collectible form that could be stored underground. The device is based on a carbon capturing technology developed by Klaus Lackner of Columbia University in New York.

Canadian Prime Minister Stephen Harper ate raw seal meat as he launched the Canadian Northern Economic Development Agency, a federal body designed to speed up the development in northern Canada. Its establishment is one of the commitments promised by Ottawa under the Economic Action Plan, on Tuesday.

The launch of the agency is one of the highlights of the five-day visit of the prime minister to Canada's north, which he has done yearly. Harper also replicated what Canadian Governor General Michaelle Jean had done when she was in the same region a few weeks back - that is eat seal meat to send a message to the European Union that Canada backs the seal hunt industry.

The man who flew a balloon around the world has unveiled a solar-powered airplane that he hopes to fly night and day around the world.

The Solar Impulse HB-SIA has a wingspan of 224 feet - the same as a Boeing 747 - but weighs about the same as a car, according to Bertrand Piccard during a press conference at an airport outside Zurich.

Chinese researchers may have developed an injectable male contraceptive that is reversible and has few serious side effects, according to a report published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism.

The contraceptive is a combination of testosterone in tea seed oil. Chinese researchers conducted a study of 1,045 Chinese men between the ages of 20 and 45, in which each man had fathered at least one child. Each of the men had sexual partners between the ages of 18 and 38 years old.

Deadly carbon monoxide gas leaking into a church sent six people to the hospital in Madison, WI, early Sunday afternoon.

People started feeling sick during Sunday morning services at Trinity United Methodist Church. An ambulance was called after a 2-year-old child became groggy and lethargic. Then other children began and adults reported feeling sick and dizzy.