Possible Clues:

• It holds about 70% of the world population
• Huge landmass
• On reflection, lives to regret crossing area, a huge one
• '1984' land
• One of the three superstates in George Orwell's 'Nineteen Eighty-Four'
• Is a herb seen over area that's as big as this?
• Home to 4.6 billion
• It stretches from Iberia to Siberia
• Silk Road supercontinent
• World's largest land mass