Ask and you shall receive:
(i) The planet is warming due to increased concentrations of heat-trapping gases in our atmosphere. A snowy winter in Washington does not alter this fact.
The planet is warming due to natural changes. Some of this is due to greenhouse gasses, but much of it is also due to solar activity and geothermal activity. The problem is many of the environmental models don't even take other factors into account.
(ii) Most of the increase in the concentration of these gases over the last century is due to human activities, especially the burning of fossil fuels and deforestation.
This statement is flat out false. If it were true then man would have to make a significant contribution to greenhouse gasses. The number one greenhouse gas (95%) is water vapor which is 99.99% natural. CO2 comprises 3.62% of all greenhouse gasses of that 0.117 is man-made. The total percentage of man-made contributions to greenhouse gasses are a whopping 0.28%. Source: http://www.geocraft.com/WVFossils/greenhouse_data.html.
(iii) Natural causes always play a role in changing Earth's climate, but are now being overwhelmed by human-induced changes.
No they aren't, see above.
(iv) Warming the planet will cause many other climatic patterns to change at speeds unprecedented in modern times, including increasing rates of sea-level rise and alterations in the hydrologic cycle. Rising concentrations of carbon dioxide are making the oceans more acidic.
This would only be true if warming occurred faster or larger than the Earth's climate can handle. Phil Jones, one of the authors of the IPCC report, admitted that non only was the Earth warmer during the Medieval Warming period but that Earth hasn't statistically warmed in 10 years. Sources: http://www.bluegrasspundit.com/2010/02/climategate-expert-phil-jones-admits.html, http://wattsupwiththat.com/2010/02/14/phil-jones-momentous-qa-with-bbc-reopens-the-science-is-settled-issues/
(v) The combination of these complex climate changes threatens coastal communities and cities, our food and water supplies, marine and freshwater ecosystems, forests, high mountain environments, and far more.
This is fear-mongering with no facts to refute.
Your turn, warmer.