Group IIA of the periodic table contains elements that are gaseous non-metals.
Indicate whether the statement is true or false
Question 2
What is the cause of the following symptom of pollution? A lake is covered with a thick mat of green algae.
A) Inorganic fertilizers were released nearby.
B) Organic matter was released nearby.
C) There is no oxygen in the water.
D) Anaerobic bacteria are consuming most of the nutrients in the water.
E) none of the above