Sentences with phrase «understand emission factors»

Carman and other advocates say they understand emission factors will have to be used in some circumstances, and that some types of pollution can be estimated with reasonable accuracy.

Not exact matches

Barthelemy says the model could also come in handy for estimating traffic delays, gas consumption and carbon dioxide emissions, so that urban planners and policy makers can better understand how those different factors evolve as a city grows.

There are a number of factors that control CH4 concentrations that are extermely poorly understood and are mostly ignored in the scenarios — the dependence on other gases (such as O3, and CO), the impact of increased temperatures and changes to precip on tropical and boreal wetland emissions, the existence (or not) of a significant methane hydrate source from permafrost or continental shelves, the climate impact on the atmopsheric chemistry of CH4.

For instance, what I have said in my comment above should be clear enough to make politicians, too, to understand that the recent increase of CO2 content in atmosphere is dominated by natural factors and not antropogenic CO2 emissions:» The CO2 content in the atmosphere is controlled together by both all CO2 emissions from sources to atmosphere and by all CO2 absorptions from atmosphere to sinks.

It's my belief that side stepping the question of CO2 forcing and simply trying to better characterise other factors, regardless of whether CO2 has any role to play, will lead to a fuller understanding of the climate and thus a better platform from which to view what role manmade emissions does have, if any.

Then there's the problem of quantifying the variability of natural processes we know we don't understand because the estimates of various factors keep changing every year... you have to rule these things out to make sensible emissions policy, you can't just wave your hands and say «there's no evidence we're wrong so go ahead and spend trillions of dollars based on this speculation over here.»

I find it hard to understand why deniers find it so hard to comprehend that climate change isn't an either / or matter of man made emissions or natural factors (sunspots, etc.).

Finally, the researchers examined collections of model simulations with and without human emissions factored in to understand to what degree human emissions were responsible for a given impact, by comparing these simulations against observed trends.