are trying to create better batteries that can store more energy, so that electric cars can travel further on one charge.

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

d. groundwater flows through the subsoil and deposits minerals.

its temperature is increasing. this causes molecular vibrations to increase.