With carbon dioxide levels rising to the highest levels that have been seen in recorded history, it is likely that this trend will only increase. The cause of these deaths by emissions are cancer and heart disease, two of the most deadly killers in this modern age.wo of the main nutrients affected by higher levels of carbon dioxide are zinc and iron, nutrients for which about 2 billion people on Earth are already deficient (that comes out to almost 30% of the global population).
The discovery of mercury as an element was in the 18th century. Incidentally, at about the same time, also 3000 years ago, the Sumerians discovered the planet Mercury. Like the Babylonians who discovered mercury and put in many records but not as an element, the Sumerians recorded the planet mercury quite a lot.
Krypton was discovered in 1898 by Sir William Ramsay and his student Morris Travers in the residue left after liquid air had nearly boiled away. Krypton was left in the residue after boiling away water, oxygen, nitrogen, helium, and argon from the sample of air. Krypton is present in the air at about 1 ppm. Neon was discovered by a similar procedure by the same workers just a few weeks later.