The human population is the predicted to continue increaseing as thr rate of climate change also increase. What technology doesn't address the concerns raised by these trends?
A) mag-lev trains
B) man-made islands
C) self-driving cars
D) Chemically- engineered food

Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.