Over past few decades, average global temperature is rising at the fastest rate. Human activities causes increase in greenhouse gases. The main reason for this is certain gases like carbon dioxide (CO2), nitrous oxide (N2O), Methane (CH4), Chlorofluorocarbons (CFCs) etc. retains sunlight and solar irradiance which trap the heat in atmosphere hence causing global warming effects.

Global warming gradually heating earth’s surface with long lasting devastating consequences for earth. It stresses ecosystems, risking species extinction, changing rainfall pattern, increasing drought, heatwave, floods and extreme weather which affects food and farming, as well as health by increase diseases, illness and death.

Global warming changing the rainfall pattern which results in reduced rainfall and increase in droughts leading to water scarcity. With changing climate, water cycle is changing resulting increase in precipitation and runoff. Global warming anticipated rise in sea level with rising tide by melting ice glaciers. Hurricanes and cyclones getting stronger with rising sea levels. Changing climate diminishing quality and quantity of drinking water.

Seaweeds are valuable biological systems that fix atmospheric carbon dioxide and releases oxygen back to atmosphere resulting decrease in greenhouse gases. Comparing with plants, seaweed grows more rapidly than terrestrial plant without competing lands and water resources. Seaweed has potential to counteract acidification, deoxygenation as well as absorption of excess nutrition. Moreover, seaweed as live-stock feed can reduce potent greenhouse methane gas from burps of livestock.

Blue economy refers to sustainable use of ocean resources for economic growth. Seaweed offers great potential as blue economy with huge global market. Expansion of seaweed cultivation into ocean and development of high value nutritional and other commercial products for living being on earth will not only increase economy for better livelihood but also gives food security.