Subsidies to promote offshore fishing are a commonly cited example of environmentally harmful subsidies, with support that increases fishing capacity (i.e., subsidies toward constructing new boats) linked to the depletion of important fishery stocks. In other industries, subsidies that promote consumption or production have led to higher volumes of waste or emissions. For example, irrigation subsidies often encourage crops that are farmed intensively, which in turn leads to higher levels of fertilizer use than would occur otherwise. Moreover, irrigation subsidies can lead to the under pricing of irrigated water, which in turn fosters the overuse and inefficient use of water.
While many subsidies have unintended negative consequences on the environment, well designed subsidies can be beneficial when they work to mitigate an environmental problem. In the context of fisheries, for instance, these would include subsidies to management programs that help ensure that fisheries resources are appropriately managed and that regulations are enforced, or to research and development (R&D) designed to promote less environmentally destructive forms of fish catching and processing.