Earth Matters: "CBS This Morning" to bring stories from every continent for Earth Day Forty-nine years ago in 1970, CBS News covered the first Earth Day with a special report hosted by Walter Cronkite. This year, “CBS This Morning” will bring you Earth Matters, a special series of reports on our changing environment. Our team of correspondents will span the globe to explore the science that shows our planet is changing and the steps being taken to protect it. Tune in Monday, April 22, for our coverage.