Cloud seeding does not create clouds or precipitation from clear skies. It can only be effective when clouds with the right ...

Questions about cloud seeding, geoengineering and other weather-modification practices are drawing new attention as critics ...

Add Yahoo as a preferred source to see more of our stories on Google. I recently wrote a column about the “chemtrail” conspiracy theory, and to say it caused quite a stir would be a serious ...

If you look up in the sky during a sunny day, you might see long, skinny looking clouds coming from behind planes. Those are contrails, short for ‘condensation trails.’ Airplane engines produce them ...

According to an analysis, 25 percent of the global warming caused by contrails in European air traffic is attributable to ...

SINGAPORE – The white streaks left by planes as they zip through the skies make a pretty sight, but they can harm the planet at times. These vapour clouds formed from planes’ engine exhaust are known ...

Clouds come in all types, shapes and sizes. It can be used to determine current and future weather conditions just by looking at the sky. Clouds were studied and named by Englishman Luke Howard in the ...

Ever notice some days the "jet trails" are long and some days they're short. These contrails formed by airplanes flying from 25,000 to 40,000 feet can be a weather clue. They only form in moist air ...

Contrails – short for condensation trails – are linear clouds made up of ice crystals that form behind jet aircraft at high ...

You see them all the time, probably almost daily — airplane contrails and factories or power plants with never-ending white gasses billowing out. Did you know these can give you clues to our ...