How do I ?
Over the past decades, THC concentrations and variances in weed have steadily increased. From 1993 to 2008, the average potency of flower went from 4% to 12% (Link) The range of potency has also increased from yearly potency varied from 2.5-9.2% (1993-2003) to 12.0-29.3% (2004-2008).
With cannabis potency increasing, being more careful and cautious about consumption is a good thing. As the old adage goes, start low and slow and consider purchasing lower potency strains alongside higher potency strains based on different occasions that may arise.