What is a nice introduction for an essay about what are the causes and effects of global warming?

Answer 1

"Are we destroying the earth with technology or is the earth doing business as usual"
I suggest you track the changes scientists have found in the entire history of the earth, warming, freezing, wet and even effects of smoke from Krakatoa. Then compare what is happening now with pollution and the depletion of the ozone layer and ask the readers to make their own conclusion.

Answer 2

Science Fact or Fictional Speculation?
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Fear Tactics or Political Football?
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Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.

The Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities".

The increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of warming. They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. The first speculation that a greenhouse effect might occur was by the Swedish chemist Svante Arrhenius in 1897, although it did not become a topic of popular debate until some 90 years later.

The measure of the response to increased GHGs, and other anthropogenic and natural climate forcings, is climate sensitivity. It is found by observational and model studies. This sensitivity is usually expressed in terms of the temperature response expected from a doubling of CO2 in the atmosphere. The current literature estimates sensitivity in the range 1.5–4.5 °C (2.7–8.1 °F). Models referenced by the Intergovernmental Panel on Climate Change (IPCC) project that global temperatures might increase between 1.4 and 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100. The uncertainty in this range results from both the difficulty of estimating the volume of future greenhouse gas emissions and uncertainty about climate sensitivity.

An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer stream flows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming.

Although most studies focus on the period up to 2100, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has an estimated atmospheric lifetime of 50 to 200 years.

Only a small minority of climate scientists discount the role that humanity's actions have played in recent warming. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences.

Answer 3

First establish the facts.
the increase of CO2 ,it is not there because the plants absorber the CO2 and produce oxygen. Go measure it ,it is not there.
The increase in Methane is calculated not measured. Methane is a light gas and will rise up in the atmosphere until it will oxidize in the sunlight .
There are many facts that are not true so it will be difficult to actually prove that global warming is there or not.

Answer 4

Ok well heres what I would say:
Glade. We all use it. In our bathrooms, before guests come, everyday of our lives. It contains no CFC's [chemicals that puts holes in teh ozone layer] But sadly, glade is one of the few things that has No CFC's. We need to stop this. We need to stop harmful chemicals. We need to stop damaging teh earth. AND WE NEED TO STOP GLOBAL WAMRING!....and heres why and how!

Answer 5

start with mentioning the ongoing discution about global warming, and the different views (human induced or not)