Atmospheric sciences and radiant energy. In contrast to meteorology, which studies 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. Climatologists, those who practice climatology, 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 include the atmospheric boundary
Long-term effects of cannabis in adolescent users. Cannabis can contain over 100 different cannabinoid compounds, many of which have displayed psychoactive effects. The most distinguished cannabinoids are ∆9 – THC (THC) and cannabidiol (CBD), with THC being the primary agent responsible for the psychoactivity of cannabis. The effects of THC and CBD are salient regarding psychosis and anxiety. As of 2017 there is clear evidence that long term use of cannabis increases the risk of psychosis, regardless of confounding factors, and particularly for people who have genetic risk factors. Numerous studies have been conducted regarding anxiety and cannabis for therapeutic purposes, and these cross-sectional