Before global warming started 18,000 years ago most of the earth was a frozen and arid wasteland over half of earth 's surface was covered by glaciers or extreme desert forests were rare. The destruction of forests forests are very important to the enviroment because they use carbon dioxide (co 2 ) and produce oxygen they also provide shelter and food for many different types of plants and animals. By the end of the 19th century, much of the northern forest had been cleared for agricultural use or heavily logged for timber products, with the exception of extreme northern areas of maine and the great lakes states and some inaccessible areas in the appalachian mountains. Clearcutting, clearfelling or clearcut logging is a forestry/logging practice in which most or all trees in an area are uniformly cut down along with shelterwood and seed tree harvests, it is used by foresters to create certain types of forest ecosystems and to promote select species that require an abundance of sunlight or grow in large, even-age stands.
The tropics are a region of the earth surrounding the equatorthey are delimited in latitude by the tropic of cancer in the northern hemisphere at 23°26′127″ (or 2343685°) n and the tropic of capricorn in the southern hemisphere at 23°26′127″ (or 2343685°) s these latitudes correspond to the axial tilt of the earth. Additionally, we now have a better understanding than ever before of what's happening to forests between eyes in the sky in the form of satellites and eyes on the ground in the form of camera traps and sensors, citizen journalists and scientists, and an ever-expanding network of scientists, conservationists, and environmentalists, forests. At 002% of its forested area, deforestation in canada is among the world's lowest, yet many myths exist about the state of our forests the reality is that canada is a world leader in sustainable forest management. Global warming is defined by the american heritage dictionary of science as an increase in the average temperature of the earth's atmosphere, either by human industry and agriculture or by natural causes like the earth has experienced numerous times through its history.
Unfortunately, and as we have seen in this and other lectures, there are true limits to primary production based on the amount of light energy available at earth's surface, and the efficiency at which light energy can be converted into carbon during photosynthetic reactions. In more recent times (say over the last 1-5 ma), the forests of the tropics have gone through many cycles of fragmentation and reunion, due to the same global climate changes that gave us repeated bouts of glaciations at higher latitudes. Deforestation is the permanent destruction of indigenous forests and woodlands the term does not include the removal of industrial forests such as plantations of gums or pines deforestation has resulted in the reduction of indigenous forests to four-fifths of their pre-agricultural area. Forests account for most of our global changes that have been happening recently, since they act as the lungs of the earth the great loss of them has caused there to be a steadily growing amount of carbon dioxide as well as other greenhouse gases.
For example, forests in the northeastern us appear to have high natural resilience to climate change what makes these forests naturally resilient in part is their diversity diversity encompasses the number of species, their genetic variation, and the broad range of their functional attributes. The battle we have fought, and are still fighting, for the forests is a part of the eternal conflict between right and wrong - john muir we abuse land because we regard it as a commodity belonging to us. It has been estimated that about half of the earth's mature tropical forests between 75 million and 8 million square km of the original 15 million to 16 million square km that until 1947 covered the planet have now been cleared. Plants have run the biological carbon cycle for 3 billion years in the ocean, and for the past 400 million years on land, using the process of photosynthesis to convert atmospheric co 2 into carbon-rich carbohydrates and sugars to feed themselves and they are very good at it. By the year 2030, we might only have 10% of our forests left and if we don't stop deforestation, they could all be gone in 100 years agriculture is the leading cause of deforestation we clear the land to raise livestock or to plant other crops that can be sold, such as sugar cane and palm oil.
B) scientists have finally identified most of the species on earth and are thus able to quantify the number of species becoming extinct c) the current rate of extinction is high and human activities threaten biodiversity at all levels. The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere. The atmosphere is a mixture of nitrogen (78%), oxygen (21%), and other gases (1%) that surrounds earth high above the planet, the atmosphere becomes thinner until it gradually reaches space high above the planet, the atmosphere becomes thinner until it gradually reaches space. Natural resources and recycling the earth is a closed systemfor our examples, we need to think that nothing comes in (except energy) and nothing goes out (except energy. Together, we protect redwood forests from threats such as unsustainable development restore the forests we have lost and connect people to these towering wonders of nature with your help , we can leave the forests — and the world — in a better place than we found them.
Biodiversity or biological diversity is a term that describes the variety of living beings on earth in short, it is described as degree of variation of life biological diversity encompasses microorganism, plants, animals and ecosystems such as coral reefs, forests, rainforests, deserts etc. Deforestation is the massive cutting down and clearing of trees and plants because many animal species that live in the forests are herbivorous, such as giraffes, deer and tapirs, they are forced to leave what once was their home to search for food. Description of what scientists find happening in nature repeatedly in the same way, without known exception see first law of thermodynamics, law of conservation of matter, second law of thermodynamics.
This is what is happening to the earth as man destroys these rain forest these are the lungs of the earth and may have a drastic affect if lost global warming, ozone depletion, new and more deadly diseases, and loss of rainfall all may be a direct cause of rain forest destruction. Since 1978 over 750,000 square kilometers (289,000 square miles) of amazon rainforest have been destroyed across brazil, peru, colombia, bolivia, venezuela, suriname, guyana, and french guiana. As the earth spins each day, the new heat swirls with it, picking up moisture over the oceans, rising here, settling there it's changing the rhythms of climate that all living things have come to. Our mother earth is a home for all beings she is a living thing she has provided us with food, water, oxygen, and shelter but we are destroying forests and wildlife and have polluted the air, water and soil.
Description of a climate change analyst career - a climate change analyst, also known as cca, is a person that use existing climate data to create mathematical models of what will happen to ocean and land temperatures in the next 50 years.