The cyclical activity of the Sun as well as other variations in solar and earth activity, and NOT anthropogenic CO2 emissions, are responsible for climate change
Overwhelming scientific consensus finds human activity primarily responsible for climate change. [...] The amount of solar energy received by the earth goes up and down in cycles, but overall there is no net change since the 1950s. There has, however, been a big increase in global temperatures that is too large to attribute to the sun. For this reason, NASA and other scientists say the sun is not responsible for global warming. [28] The sun has had only a minor effect on the Northern Hemisphere climate over the past 1,000 years, and global warming from human-produced greenhouse gases has been the primary cause of climate change since 1900. [26] A study found that solar activity could not have contributed to more than 10% of the observed global warming over the 20th century. [27] [...] A study published in Energy & Environment wrote, "variations in solar activity and not the burning of fossil fuels are the direct cause of the observed multiyear variations in climatic responses." [69] In a study by Willie Soon, PhD, Physicist at the Harvard-Smithsonian Center for Astrophysics, a strong correlation between solar radiation and temperatures in the Arctic over the past 130 years was identified. [70]