the ability to keep doing something difficult, unpleasant, or painful for a long time

very severe or bad

dangerous and involving risk, especially to someone's health

the activity of giving tasks to a large group of people or to the general public, for example, by asking for help on the internet

information, especially facts or numbers, collected to be examined and considered and used to help decision-making, or information in an electronic form that can be stored and used by a computer

to discover the exact size or amount of something

(a person who is) involved in or connected with improving people's lives and reducing suffering

someone who works to protect the environment from the damaging effects of human activity

the time of year when crops are cut and collected from the fields, or the activity of cutting and collecting them, or the crops that are cut and collected

one of the many substances found in food such as meat, cheese, fish, or eggs, that is necessary for the body to grow and be strong

a substance made from a plant, used to give a special flavour to food

to return something or someone to an earlier good condition or position

causing little or no damage to the environment and therefore able to continue for a long time

a small creature with a soft, wet body and a round shell, that moves very slowly and often eats garden plants

a result or effect of an action, situation, etc

decaying plant material that is added to soil to improve its quality

a place, especially including buildings, where a particular activity happens

not established to make a profit

taking action by causing change and not only reacting to change when it happens

a person who is one of the first people to do something

far away in distance

using the most advanced and developed machines and methods

a large hole in the side of a hill, cliff, or mountain, or one that is underground