recovery of landscape recovery plan recreation recreational area
recyclability recyclable plastic recycled material recycled paper
recycling industry recycling potential recycling ratio reduction
reeds reef reference service referral information
referral information system refinery refining reflection
reflectometry refrigerant refrigeration refrigeration industry
refrigerator refuge refugee refuse collection vehicle
refuse-sludge compost region regional convention regional development
regional law regional natural park regional plan regional planning
regional regulation regional statistics regional structure registered site
registration obligation registration proceeding regulative law rehabilitation
rehousing reintroduction relational database release
release of organisms religion remote sensing remote sensing centre
removal remuneration of work renaturation renewable raw material
renewable resources renovation rental housing repair business
replacement cost reporting process repression reproductive manipulation
reptiles rescue service rescue system research
research centre research institute research policy research project
reservoir residential area residential building residual risk
residual waste residual waste sludge residue production residue
Algunos ejemplos : Resolución judicial   Refugiados   Escuela primaria   Agricultura ecológica   Tratamiento del cáncer