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Anthropogenic climate change is real (Climate explained: how munch of it…
Anthropogenic climate change is real
Climate explained: how munch of it is natural? how much is man-made?
What climate changes are being detected?
Average global temperature has increased by 1°C since 1850
Increasing at ever faster rates
Currently 0,2°C per decade
Oceans are warming
90% of extra heat is absorbed in the oceans
Sea levels rising
melting of glaciers
big impact on arctic ecosystems
warm water takes up more space
threatening lower lying coastal areas
The Netherlands
Pacific island atolls
Is it caused by humans?
Land cover changes
Deforestation
Fossil fuel burning
agriculture
Cement production
New, M. (2019, september 18) "Climate explained: how much of it is natural? how much is man made? The Conversation, from:
http://theconversation.com/climate-explained-how-much-of-climate-change-is-natural-how-much-is-man-made-123604
Humans are causing global warming
Claim: today's global warming is no different from previous warming periods in earth's past
False
Natural changes in the sun and the earth cannot explain today's global warming
Human activities are causing earth to heat up in ways that are different from warm periods in the past
Since 1900, the average surface temperature has risen by 1 degree celcius
Steepest rise began in 1970 and continues today
Does not sound like a lot
but earth is only 4-5 degrees warmer since the last ice age
Temperature is rising faster than it has risen in 7000 years
If it is not stopped
by 2100 the teperature will have risen by 4 degrees
Earth will get hotter over a millenium than over a few thousand years
https://sites.nationalacademies.org/BasedOnScience/climate-change-humans-are-causing-global-warming/