REASON
cause, explanation, rationale, motive, grounds, contributors, causative factor, ...
DISADVANTAGE
drawback, demerit, downside, negative aspect, negative side, minus point
SOLVE
tackle, address, work out, deal with, cope with, combat, fight off
WAY
approach, means, method, measure
REDUCE (the negative impact)
mitigate, lessen, curb, minimize, alleviate, cut down
PEOPLE
individual
ADVANTAGE
benefit, merit, upside, positve aspect, positive side, plus point
SOLUTION
measure, remedy, resolution