Ever wondered what the CO2 levels of Earth is? Or maybe even the current sea level or average global temperatue? Nasa.gov charts this out @ Evidence | Facts – Climate Change: Vital Signs of the Planet - https://climate.nasa.gov/vital-signs/carbon-dioxide/
Mars has reached opposition. On May 30, 2016 it will be the closest to the Earth that it has been since 2005. #Mars #Planet #Earth http://www.nasa.gov/feature/goddard/2016/hubble-takes-mars-portrait-near-close-approach/