advantages and disadvantages of greenhouse effect
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Answers:Disadvantages; 1. MAY NOT HAVE THE PROPER TYPE OF INSECTS FOR POLLINATION 2. MUST BE WATERED MANUALLY 3. CAN BECOME TOO HOT IN SUMMER IF NOT VENTILATED advantages : 1. CAN GROW FLOWERS AND VEGETABLES IN WINTER 2. PROTECTION AGAINST ANIMALS EATING THE PLANTS 3. CAN START VEGETABLE PLANTS EARLIER IN THE SEASON
Answers:The "greenhouse effect" keeps Earth warm enough for us to live and grow food. But too much would be bad. Some gases ("greenhouse gases") let sunlight in, which warms the Earth, and then block that heat from leaving. That's the "greenhouse effect", and it's a natural thing, mostly caused by water vapor. Man is making excessive amounts of greenhouse gases, mostly by burning fossil fuels. That causes the delicate natural balance to go out of whack and the Earth warms. That's global warming. It won't be a Hollywood style disaster. Gradually coastal areas will flood and agriculture will be damaged. But it will be very bad. Rich countries will cope, but it will take huge amounts of money. In poor countries many people will die of starvation, but not all of them. Most scientists say, in 20-50 years. But we need to start right now to fix it, fixing it will take even longer than that. Really good website for more information here: http://profend.com/global-warming/ "If the Earth came with an operating manual, the chapter on climate might begin with a caveat that the system has been adjusted at the factory for optimum comfort, so don't touch the dials."
Answers:For all who love plants and flowers, nothing is more exciting, more stimulating, than growing them in a garden under glass. When the north wind whistles and the snowflakes cling, when panes go opaque as temperate climate confronts zero, your greenhouse is a place of utter delight, fun to work in, a joy to contemplate, with a wealth of beauty and fragrance to share. http://www.lovelygreenhouses.com/
Answers:This "Greenhouse Management Handbook" lists types, structural components, framing and covering materials incl. their advantages and disadvantages: http://aggie-horticulture.tamu.edu/GREENHOUSE/nursery/guides/ghhdbk/struc.html A second one: http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-1286/F-6700web.pdf And here some specialized sites: http://www.cababstractsplus.org/google/abstract.asp?AcNo=20033207099 http://www.freepatentsonline.com/4144899.html