A risk management strategy that successfully achieves overall risk reduction for at least one or both risks, that does not require a tradeoff between risks, can be illustrated by an outward shift (right panel, Figure 2.4), resulting, for example, from increased efficiency in use. This can be done by altering risk drivers, by limiting exposure or enhancing the resilience of the community, physical assets, and the environment by making them less vulnerable to potential harm. There are many possible adaptation strategies that can be used to manage water risks (illustrated in Table 2.1). From an economic perspective, it is possible to have too much or too little adaptation, as well as mal-adaptation. In the context of risk and uncertainty, decisions are informed by weighing expected costs and benefits - that is, the probability-weighted mean over the range of possible outcomes. In the case of climate change adaptation, the cost of actions is more likely to be known and incurred in the near term, while many of the benefits (avoided climate impacts) will accrue far into the future and will not be known with certainty.