Z1-J.S.

= __science extensions-global warming notes__ =

1 Step one notes At [] I found that carbon dioxide can last in our atmosphere intensifying the grren house affect for up to 100 years. Also, when trees are cut down, more C02 will be in the atmosphere, this is beause trees absorb the carbon dioxide. When heat trys to escape the earth, the "green house" gasses prevent as much heat from going into space. Carbon dioxide (C02), nitros oxide (N20), methane (CH4) and other variose gasses are the green house gasses. These green house gasses make earth livable, but too many could make the world too hot. Some heat from Eath is released into space, but most is contained.

2. poster 3. __3 Reasons Global Warming Reflection__

At this sites I found my step 3 information; Global Warming 101

The gas that causes the most global warming is carbon dioxide, (C02). More C02 is put into the air because trees absorb C02, and humans are cutting down more trees every year, so less carbon dioxide is being absorbed. Another leading gas is methane (CH4), realesed from landfills and agriculture. There is also nitrous oxide (N20), and this is not as common as something like C02, but is 300 times as powerful. Scientist belive that the biggest cause of global warming is burning fossile fuels, one big problem though is that people keep on cutting down trees to develope more land into things like sub-divisions, but when people cut them down more C02 is released into the atmosphere because trees absorb the carbon dioxide. Some things that may come with global warming is costal areas being flooded, hurricanes becoming more constant, drought will occur in warm areas, and animals that can't adapt could become extinct. One hour of sunlight could meet the worlds energy demand for a year, and wind power could supply 40% more than the worlds electricity demand currently.

4. __Is Global Warming Real Reflection__ I found my information at [] So far, over the past century scientist say that the average temperutures have increesed by aroun 1 degree. in may seem small, but that could meen the difference from freezing, and not freezing. And the this is almost doubled in the arctic areas. To find out how hot or cold it was thousands of years ago, unfortunatly we can't look on a computer in some records, instead, we can look at trees, the rings on trees can tell us what the temperutures were for that year. For instance, if the ring is thick, it meant that the year was warm and wet. Those are good conditions for a tree, my guess is that this also means that if a ring is small, or some-what damaged that the year was cold and had bad weather conditions for a tree. Then, if you can put the information from the past, and put the current weather conditions on a model, scientists can see what the future weather will be like.

It is hard to be able to say if global warming is real at this point, greenhouse gasses and the effect seem to be real, but if so much heat can come in, then why can't they go out? also, you have think about how we have a huge hole in our ozone layer, that has to count for something. Maybe a lot of heat can come through that gap, but then i bet a lot could leave t so, so far I don't really think that global warming is real, about 30 or so years ago scientists were all positive that we were going into an ice age, so maybe global warming really is just a coinsedence.

Problems could be brought up for crops in North America, espesially if they are in warmer temperetures or need highly-utilizes water sources. The same type of global warming problem is brout up in different areas of the world as well, like in Australia and Asia.

=5. Reducing global warming=

Some things that may cause global warming that we could be able to stop or improve are things like cutting down trees. This could be hard because we need to for wood, but we could recycle a little more, and also use other resources that are plentifull. Cutting down trees could really increase the carbon dioxide level in out atmosphere. another way is to not have as many landfills, we can recycle more! this is an important thing for the earth and nothing seems to be happening about it. The third thing that we could do is to use less aresols, its a thing that people like to use, like for cologn, perfumes, hairspray, etc. We used to just use soap, so I think that we are able to cut down on those a little bit more.