Brazil's archaeologists join fight to preserve country's ancient lands

• Government plans to roll back regulation for construction projects
• Critics say proposals threaten indigenous groups and cultural heritage

Brazil's archaeologists have lined up alongside conservationists and indigenous rights campaigners to protest against government proposals that they see as a threat to pre-colonial cultural heritage as well as forests, native communities and biodiversity.

Related: Brazil's plan to roll back environment laws draws fire: 'The danger is real'