This publication contains 100 of the most common critical questions about climate change, which were asked to the author at lectures, seminars, press conferences and other discussions on this issue. The work is a significantly supplemented and revised edition of the answer cards to the questions of the "climate skeptic," published in 2008. The answers are grouped into 8 topics, the sequential presentation of which allows you to summarize the main facts about climate change, the causes and consequences of the observed effects, possible measures to reduce anthropogenic influence on the climate. Particular attention is paid to the situation in the Arctic.