The benefits of higher CO2 levels for crops have been known for a century; this photo contrasting large potatoes grown with extra CO2 to small potatoes grown without it from a 1920 Scientific American article.

If you'd like to learn more about climate change, here are some trustworthy resources

Introductions: 
1. http://ClimateCurious.com
2. http://prageru.com/playlists/what-science-reveals-about-climate-change

In-depth, balanced debate, between leading experts on both sides: 
3. http://thebestschools.org/special/karoly-happer-dialogue-global-warming

Amicus brief in Calif v. BP lawsuit, by 3 top scientists: 
4. http://co2coalition.org/wp-content/uploads/2018/03/Happer-Koonin-Lindzen.pdf

Physics: 
5. Happer 2014 UNC physics colloquium: https://sealevel.info/Happer_UNC_2014-09-08/
6. Wilson, 2012, Simple model to estimate the contribution of atmospheric CO2 to the Earth's greenhouse effect
7. Pierrehumbert, 2011, Infrared radiation and planetary temperature  (and discussion)

Hurricanes & tropical cyclones are not worsening (graphs): 
8. https://lab.weathermodels.com/tropical/frequency_12months.png (was here)
    https://lab.weathermodels.com/tropical/global_running_ace.png (was here)
    https://www.wunderground.com/hurricane/accumulated_cyclone_energy.asp?basin=gl&MR=1 (or here)

Tornadoes are not worsening (graph): 
9. https://www1.ncdc.noaa.gov/pub/data/cmb/images/tornado/clim/EF3-EF5.png

Sea-level (shameless self-promotion of my own web site): 
10. http://sealevel.info
11. http://sealevel.info/MSL_global_thumbnails5.html
12 http://sealevel.info/acceleration_primer.html ("acceleration primer")

Benefits of CO2… 
…and for deserts & natural ecosystems:
13. http://sealevel.info/greening_earth_spatial_patterns_Myneni.html
…for agriculture:
14. http://sealevel.info/1920sciamCO2
15. http://co2coalition.org/
16. http://co2science.org/data/plant_growth/plantgrowth.php
17. Higher CO2 level is one of the reasons famines are becoming increasingly rare

Top climate blog (news and discussion): 
18. http://wattsupwiththat.com

19. One of the fathers of modern climatology was the great Swedish scientist, Svante Arrhenius. He was the first person to quantify the warming effect of mankind's CO2 emissions, and correctly predict that it would benefit agriculture. He even predicted what is now called “polar amplification.” In a 1908 book he wrote, "By the influence of the increasing percentage of carbonic acid in the atmosphere, we may hope to enjoy ages with… better climates,… when the earth will bring forth much more abundant crops than at present, for the benefit of rapidly propagating mankind."