Climatists cannot ban Internet, but they can saturate it with their Big Lie, and have already done that. Nevertheless,
Sane Climate Search Engine allows you to see the realist side of the debate.
Focused Search of Climate Alarmism Governance allows you to learn about the major players behind the climate hysteria.
WattsUpWithThat is the top site on the subject. WUWT is edited by Anthony Watts, a professional meteorologist. It discusses current news (and some drivel that the media tries to pass for the climate change news), and publishes in-depth research and commentary. Warning: much of its content is highly scientific.
Donna Laframboise describes how the so-called “climate science” is cooked. She writes about corrupt and incestuous relationships between the transnational enviro-lobby and the International Panel on Climate Change, appointment of the former as a de-facto speaker of the latter, the anti-human agenda of the Climate Alarmism, and the human (or inhuman) side of the climate science kitchen in general. Her site is an invaluable resource for those who wish to evaluate the so-called “climate science”, but lack relevant expertise or spare time. Donna is the author of The Delinquent Teenager Who Was Mistaken for the World’s Top Climate Expert, a highly recommended book about the IPCC.
Richard Lindzen is a member of the National Academy of Sciences and a distinguished physicist, who have been working on the science of global warming / climate changes since 1979. He provides a unique insight into both physics and politics behind the so-called “climate change”. His 1992 (!) article Global Warming. The Origin and Nature of the Alleged Scientific Consensus is a real eye opener. I compiled a small collection of popular articles by Prof. Lindzen.
Defeat Climate Alarmism (this site)
There are hundreds of good books and websites on the topic, and it is hard to select the best ones for inclusion in the short list.
Unfinished Draft. Updated 2016-06-30.