"Land-based pollution sources" refers to the sites or facilities that discharge from the land into the sea pollutants which cause or may cause Marine environment pollution.

陆地污染源(简称陆源)，是指从陆地向海域排放污染物，造成或者可能造成海洋环境污染的场所、设施等。

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In fact over 80% of all Marine pollution comes from land-based activities and many pollutants are deposited in estuaries and coastal waters.

事实上超过80%的海洋污染来自陆地活动和许多污染物沉积在河口和沿海水域。

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The land-based pollutants contribute the main pollution source for the marine environment.

陆源是海洋环境污染的主要来源。

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The project looks at four main threats to coral reefs -- marine-based threats, over-fishing, coastal development, and land-based sources of pollution -- in six main coral reef regions.

CNN: Could online maps save coral reefs?

Few countries have adopted legislation to reduce land-based marine pollution, leading to an increase in the number of dead ocean areas.

UNESCO: Social and Human Sciences

Experts gave an overview of current threats and challenges, including declining coral reefs and acidification (Scott Doney), sea level rise (Joe Appiott), coastal erosion, land-based sources of marine pollution, and overfishing (Brittany Baschuk).

UNESCO: Social and Human Sciences