Claim: It’s not carbon dioxide, it’s not methane… Scientists estimate that somewhere between 75% and 90% of Earth greenhouse effect is caused by water vapor in clouds.”

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The largest human influence has been the emission of greenhouse gases such as carbon dioxide, methane, and nitrous oxide.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Of these emissions, 65% was carbon dioxide from fossil fuel burning and industry, 11% was carbon dioxide from land use change, which is primarily due to deforestation, 16% was from methane, 6.2% was from nitrous oxide, and 2.0% was from fluorinated gases.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: By their percentage contribution to the greenhouse effect on Earth the four major gases are: water vapor, 36–70% carbon dioxide, 9–26% methane, 4–9% ozone, 3–7% It is not possible to assign a specific percentage to each gas because the absorption and emission bands of the gases overlap (hence the ranges given above).

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Water vapor accounts for the largest percentage of the greenhouse effect, between 36% and 66% for clear sky conditions and between 66% and 85% when including clouds.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Excluding water vapor, about half of landfill gas is methane and most of the rest is carbon dioxide, with small amounts of nitrogen, oxygen, and hydrogen, and variable trace amounts of hydrogen sulfide and siloxanes.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Though water is responsible for most (about 36-70%) of the total greenhouse effect, the role of water vapor as a greenhouse gas depends on temperature.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The primary greenhouse gases in Earth's atmosphere are water vapor (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone (O3).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The dominant contributor to the greenhouse effect is water vapour (~50%), with clouds (~25%) and CO 2 (~20%) also playing an important role.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: While water vapour (~50%) and clouds (~25%) are the biggest contributors to the greenhouse effect, they increase as a function of temperature and are therefore considered feedbacks.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The water vapor in the stratosphere arrives through tall [[thunderstorm]]s, while 15% of this vapor is delivered by tropical cyclones, and through chemical breakdown of [[methane]] into water vapor and carbon dioxide, both of which are greenhouse gases.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Water vapor is the most abundant greenhouse gas and is the largest contributor to the natural greenhouse effect, despite having a short atmospheric lifetime (about 10 days).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Since water vapor is a greenhouse gas, the increase in water vapor content makes the atmosphere warm further; this warming causes the atmosphere to hold still more water vapor (a positive feedback), and so on until other processes stop the feedback loop.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: After water vapour (concentrations of which humans have limited capacity to influence) carbon dioxide is the most abundant and stable greenhouse gas in the atmosphere (methane rapidly reacts to form water vapour and carbon dioxide).