I was in Peru for a month at the beginning of the year and there were similar rumors abound regarding the closing of the famous Inka Trail in a few years. Not to lessen the story but sometimes I wonder if some of these are planted to encourage people to visit these place "before they're gone".
From what I saw, these popular tourist sites are fine as the government realizes the importance of their preservation to maintain the tourist industry. Every guide I talked to about the Inca Trail rumor said it will never happen. They close the trail every February (slowest season, dangerous too with the rain) for maintenance and also limit the number of groups on the paths at anytime by issuing a limited number of permits.
This isn't required in Nazca, as you fly over on a plane, so beyond the carbon impact of flying, I can't see it getting to a point where there are "too many tourists" that would damage the lines.
From what I saw, these popular tourist sites are fine as the government realizes the importance of their preservation to maintain the tourist industry. Every guide I talked to about the Inca Trail rumor said it will never happen. They close the trail every February (slowest season, dangerous too with the rain) for maintenance and also limit the number of groups on the paths at anytime by issuing a limited number of permits.
This isn't required in Nazca, as you fly over on a plane, so beyond the carbon impact of flying, I can't see it getting to a point where there are "too many tourists" that would damage the lines.