How many seconds are there in one light-year?

Why are the trends and exceptions to the trends in ionization energy observed?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's