This is probably because scientific journals get cross-referenced and peer-reviewed by other mainstream scientific organizations whereas a regular webpage can tell you just about anything without anything to back it up. Their credibility isn't as high.
Plants reproduce using seeds
The battles were fought on April 19, 1775 in Middlesex County, Province of Massachusetts Bay, within the towns of Lexington, Concord, Lincoln, Menotomy (present-day Arlington), and Cambridge. They marked the outbreak of armed conflict between the Kingdom of Great Britain and its thirteen colonies in America.
Answer:
environmental pollution
food shortage
insufficient transportation
income inequality
Means that economics take finesse. it’s all about making a profit, supply goes up demand goes down, demand goes up supply goes down.