• Pollution by sediments Although agriculture contributes to a wide range of water quality problems, anthropogenic erosion and sedimentation is a global issue that tends to be primarily associated with agriculture.

• Many countries can no longer manage pollution by dilution, leading to higher levels of aquatic pollution.

• The investigators concluded that mangrove conservation is dependent on solving the plastic pollution issue, with source control a priority target (Ivar do Sul et al., 2014).

• These include forest fires, floods, oil spills and chemical pollution of waterways.

• Key human influences include changes in greenhouse gas concentrations, stratospheric ozone depletion, local air pollution and alterations in land use.

• In addition, there are other important non-climatic factors affecting fish resources, particularly those of man-made pollution and resource mismanagement.

• Atmospheric pollution from major volcanic eruptions can influence the global climate over one to two years.

• This method could be refined perhaps by linking the taxation of negative activities with subsidies for positive activities such as actions to reduce pollution.

• Fisheries and fish production are sensitive to changes in climate and currently are at risk from overfishing, diminishing nursery areas, and extensive inshore and coastal pollution.