trong các thời gian sau, thời gian nào dài nhất?

a) 300 giây    b) 5 phút 5 giây       c) 1/10 giờ       d) 4 phút 59 giây

giúp mk với

Tham khảo ô nhiễm đất

Soil plays an important role in our life because it is the component where the sources of life like water and sunlight air come together. The pollution of this precious element has now turned into a global problem and not the only country’s concern. Soil pollution can be defined as the increase of persistent toxic elements in the soil like the presence of chemicals, salts, disease-causing agents, radioactive wastes, or anything that changes the soil’s quality and causes an adverse effect in the growth of the plant and on human health. Soil pollution can be reduced by proper regulated waste dumping and by avoiding littering, reduced use and throwing of toxic material, recycling of waste materials, decreasing the use of toxic fertilizers, pesticides, insecticides, and instead opting for organic products, stop deforestation by growing more plants (reforestation). It is our role as students to understand the importance of preserving the purity in soil and saving it from contamination by educating others on the matter through the spreading of awareness.