Climatology higher latitudes. Models can range from relatively simple to quite complex: In contrast to meteorology, which focuses on short term weather systems lasting up to a few weeks, climatology studies the frequency and trends of those systems. It studies the periodicity of weather events over years to millennia, as well as changes in long-term average weather patterns, in relation to atmospheric conditions. study both the nature of climates – local, regional or global – and the natural or human-induced factors that cause climates to change. Climatology considers the past and can help predict future climate change. Phenomena of climatological interest
Effects of long-term benzodiazepine use an increased risk of dementia but the exact nature of the relationship is still a matter of debate. A later study found no such effects. Benzodiazepines when introduced in 1961 were widely believed to be safe drugs but as the decades went by increased awareness of adverse effects connected to their long-term use became known. There was initially widespread public approval but this was followed by widespread public disapproval, and recommendations for more restrictive medical guidelines followed. Concerns regarding the long-term effects of benzodiazepines have been raised since 1980. These concerns are still not fully answered. A review in 2006