[DOC] [TLE] The Human Contribution - Fossil Fuels, The Planets Natural Balance [PAR] All fossil fuels release carbon whenever they are burned, but coal has a much 
higher ... Its powerful heat-trapping capabilities help keep the earth warm, and 
CO 2 is also ... from accumulating in the atmosphere because they could absorb 
gas. ... Living trees breathe in carbon and breathe out oxygen, and when they are 
cut... [DOC] [TLE] Effects of Changing the Carbon Cycle - NASA Earth Observatory [PAR] By burning fossil fuels, people are changing the carbon cycle with ... carbon 
dioxide, but as much as 20 percent may remain in the atmosphere for many ... 
Excess carbon in the atmosphere warms the planet and helps plants on land 
grow more. ... gas absorbs, and the concentration of the gases in the atmosphere, 
they can... [DOC] [TLE] Greenhouse Gas Emissions: Causes & Sources - Live Science [PAR] Feb 10, 2015 ... A greenhouse gas is any gaseous compound in the atmosphere that is capable 
of ... (UV), infrared (IR) and other types of radiation that are invisible to the human 
eye. ... As they absorb radiation and heat up, the oceans, land and ... When trees 
are killed to produce goods or heat, they release the carbon... [DOC] [TLE] How do trees change the climate?  RealClimate [PAR] Oct 27, 2014 ... Carbon dioxide (CO2) in the atmosphere is a greenhouse gas. ... But if we plant 
trees all in one area, and that causes a region of heating or cooling, the ... darker 
and because the water they release acts locally as a heat trapping gas. ... This 
means that tropical forests help keep the surface cool and wet. [DOC] [TLE] Deforestation and Greenhouse-Gas Emissions - Council on Foreign ... [PAR] Dec 21, 2009 ... Loss of forests is a major contributor to greenhouse-gas emissions. ... Some 
carbon gets released back into the atmosphere through respiration, but the net ... 
that U.S. forests absorb between one million and three million metric tons of ... 
When trees are burned, harvested, or otherwise die, they release their... [DOC] [TLE] FOPAP: The truth about trees [PAR] The energy contained in oxygen is not enough on its own to sustain a human ... 
right up until the day it dies  and thus help to replenish atmospheric stocks of O2
. ... who actually believe that a tree really breathes and that the gas it 'inhales' is 
CO2. ... we can't help but think of all the 'nasty' CO2 they are absorbing and all 
the... [DOC] [TLE] Forest Facts - American Forests [PAR] They improve air quality, provide wildlife habitat, increase water security, ... 
Forests are vital, but complex, ecosystems that provide so many benefits that help 
keep our ... On average, a mature tree can absorb 36 percent of the rainfall it 
comes in ... U.S. remove up to 800,000 tons of air pollution from atmosphere 
annually. [DOC] [TLE] Trees Improve Our Air Quality - Urban Forestry Network [PAR] Therefore, trees help by removing (sequestering) CO2 from the atmosphere ... 
Young trees absorb CO2 at a rate of 13 pounds per tree each year. ... At that rate, 
they release enough oxygen back into the atmosphere to support two human 
beings ... which in turn reduces the amount of fossil fuels burned to produce 
electricity. [DOC] [TLE] Where Does The CO2 Go? The Mystery Of The Missing Sinks [PAR] Feb 2, 2009 ... The tree "inhales" carbon dioxide from the atmosphere, transforming that ... gas 
into the building materials and energy it needs to grow its ... tandem with Earth's 
other trees, plants and the ocean, helps reduce ... of carbon dioxide are released 
each year by biomass burning, forest ... But what about the rest? [DOC] [TLE] CO2 Emissions - Auto Diagnosis Repair Help [PAR] This includes crude oil, gasoline, diesel fuel, natural gas, coal, wood and even 
you ... Human beings and animals exhale carbon dioxide with every breath they 
take. ... Fortunately, plants have the ability to absorb CO2 from the atmosphere 
and .... But if

Question: Trees help humanity by absorbing this gas, but it's released to the atmosphere when they are burned
Answer: carbon dioxide