chlorine and mustard gas
Natural gases are located in a few different places. Natural gases are in plants, animals and microorganisms that lived millions of years ago.
60000 years.
Yes, oils and natural gases are formed from the remains of ancient plants and animals that were buried under layers of sediment over millions of years. It can take hundreds of thousands to millions of years for these materials to be compressed and transformed into oil and gas deposits.
it would be around 650 millions of years ago
The natural greenhouse effect has kept the earth warm enough for life for millions of years.
Millions.
it can take from around 5 minutes to millions and millions of years
Birds have been around for millions of years.
for over millions of years
Board Games have been around for millions of years (BC years)
Depending on how far back, the atmosphere has changed. Around the cooling of the Earth, it would mostlikely contain large amounts of sulphur, methane and other volatile gases, coming straight from lava flows.
itill be around for millions of years until there is no english