Have Scientific advances have led to decreased energy efficiency and waste reduction.

i think it is dna, i'm not totally sure but i think it might be.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

i think its white blood cells

i hope this

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.