Trevor asked:


Both volcanoes and humans emit greenhouse gases, which contributes the most to global warming and by a factor of approx how many.

For example, “humans contribute twice as much as volcanoes” or “volcanoes contribute three times as much as humans”.
Thanks to everyone who answered. Linlyons answers is spot on – detailed, accurate, factual and back up with a credible source.

To Mr Me and others who make similar comments – humans have produced 3.2 trillion tons of greenhouse gases, if this was solid volcanic material it would be a block 2000 cubic kilometres in size, enough to make a mountain larger than Everest.

The reason I asked this question in the first place is because the claims made by some skeptics in relation to volcanoes get progressively more extreme and the same claim is rarely made twice, I get the impression some skeptics are just writing the first thing that comes to mind.

Vo

Trevor asked:


Many countries are committing themselves to reducing their greenhouse gas emissions in an attempt to stave off the effects of climate change. Typically the targets are for a reduction of between 50% and 80% and typically by the year 2050.

How realistic do you think these targets are?

What measures do you think would help in achieving these targets?

Perhaps you think we should instead be looking at ways to remove the greenhouse gases we emit rather than trying to reduce emissions in the first place.

Iteke

KOPU asked:


I’m doing a science assignment on Sydney’s desalination plant and one of the questions is how are humans involved with this issue? (i chose the issue greenhouse gas emissions)

Willyt

rpg_x87 asked:


I’m doing a research paper on why CO2 is more potent and dangerous as a greenhouse gas. As a non-science student, I’m not too familiar with the chemical reasons as to why that might be true. I’d like to know at the molecular level, why CO2 traps more heat than any other gas (Methane, Nitrogen, O2, O3, etc.)

Please provide references if you can.

Thanks!

Katey

EJ asked:


Climate models predict that increasing levels of carbon dioxide will cause the mean global surface temperature to rise by as much as 5.8 degrees Celcius by the year 2100. What other greenhouse gas must also increase in concentration in order for this condition to occur?

Jabir

Ronnie Tse asked:


Air conditioners make us feel cool in summer, but they will pump greenhouse gas out of the window. Greenhouse gas makes the air hot.

Moll

Super Cell asked:


Also, could you please list the most abundant types of greenhouse gases. Thank you.

Aile

Jay C asked:


What is greenhouse gas? And does it include fossil fuels or not? Thanks!

Gloria

michiganfan asked:


I was just thinking about candles, and wondering if the gas of candle wick is a greenhouse gas (when burned)? Would it contribute to global warming?

Phebe

Sik asked:


Doing a research project on different energies.

“If Diesel fuel was fully implemented, estimate the reductions in greenhouse gas emissions nationwide.”

Georgette