Pain is an unpleasant feeling that happens when there is or might be harm to body tissues. Scientists and philosophers agree that non-human animals, including amphibians, can feel pain. Pain is a complex experience that involves both how something feels and the emotional reaction to it.
Freshwater acidification happens when acids enter a body of fresh water. This can occur through the weathering of rocks, the entry of acid gases like carbon dioxide, or the reduction of certain anions, such as sulfate and nitrate, in lakes, ponds, or reservoirs. The main causes of freshwater acidification are sulfur oxides (SOx) and nitrogen oxides (NOx), which enter water from atmospheric deposits and soil leaching.
Ocean acidification is the gradual decrease in the pH level of Earth’s oceans. From 1950 to 2020, the average pH of the ocean’s surface dropped from about 8.15 to 8.05. Human activities that release carbon dioxide (CO₂) into the atmosphere are the main cause of ocean acidification.
Enhanced weathering is a method that helps remove carbon dioxide (CO₂) from the air. It works by spreading finely crushed silicate rocks, like basalt, across land or into the ocean. This speeds up natural chemical reactions between the rocks, water, and air.
From 1952 to 1966, the Pacific Gas and Electric Company (PG&E) released approximately 370 million U.S. gallons (1.4 × 10 liters) of wastewater containing chromium into open ponds without lining near the town of Hinkley, California. This town is located in the Mojave Desert, about 120 miles (190 kilometers) north-northeast of Los Angeles.
Pteropoda, also called pteropods, are a group of small, free-swimming sea snails and sea slugs that live in the open ocean. Their name comes from the Greek words pterón (meaning “wing”) and poús (meaning “foot”). Most pteropods live near the ocean’s surface, within the top 10 meters, and are less than 1 centimeter long.
Ocean acidification is the gradual decrease in the pH level of Earth’s oceans. From 1950 to 2020, the average pH of the ocean’s surface dropped from about 8.15 to 8.05. Human activities, such as burning fossil fuels, release carbon dioxide (CO₂) into the atmosphere.
Aquaculture of giant kelp, Macrocystis pyrifera, is the growing of kelp for uses such as food, dietary supplements, or potash. Giant kelp contains iodine, potassium, other minerals vitamins and carbohydrates.
Seaweed farming, also called kelp farming, is the process of growing and collecting seaweed. Some farmers collect seaweed from natural areas, while others grow it completely under their control. The seven most commonly farmed types of seaweed are Eucheuma spp., Kappaphycus alvarezii, Gracilaria spp., Saccharina japonica, Undaria pinnatifida, Pyropia spp., and Sargassum fusiforme.
Cellular agriculture uses cells to make agricultural products like proteins, fats, and tissues. Scientists use biotechnology, tissue engineering, molecular biology, and synthetic biology to create these products without traditional farming. This area mainly makes animal products such as meat, milk, honey, and eggs using cell cultures.