Shell argued that removing them would be too costly and risky. This made defending against missile attacks more costly and difficult. Oil extraction is costly and sometimes environmentally damaging. Heart failure is a common, costly, and potentially fatal condition. It was a lengthy and costly process. Considerable resources are diverted on costly court cases. LIMS implementations are notorious for often being lengthy and costly. These remained complex, heavy and relatively costly. This makes infrared cameras smaller and less costly. They are thinner, and less costly. Iroquois forces used hit and run tactics, harassment and avoided costly pitched battles. Software architecture is about making fundamental structural choices that are costly to change once implemented. It proved disastrous to the Huguenots and costly for France. These brushes tend to be more costly. In developed countries, AD is one of the most financially costly diseases.