diff --git a/init/builtins.cpp b/init/builtins.cpp
index f807343ab..593f718f1 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -159,8 +159,8 @@ static Result<Success> do_exec_start(const std::vector<std::string>& args) {
 }
 
 static Result<Success> do_export(const std::vector<std::string>& args) {
-    if (!add_environment(args[1].c_str(), args[2].c_str())) {
-        return Error();
+    if (setenv(args[1].c_str(), args[2].c_str(), 1) == -1) {
+        return ErrnoError() << "setenv() failed";
     }
     return Success();
 }
diff --git a/init/descriptors.cpp b/init/descriptors.cpp
index cc5b948e9..62656872f 100644
--- a/init/descriptors.cpp
+++ b/init/descriptors.cpp
@@ -28,7 +28,6 @@
 #include <cutils/android_get_control_file.h>
 #include <cutils/sockets.h>
 
-#include "init.h"
 #include "util.h"
 
 namespace android {
@@ -62,7 +61,7 @@ void DescriptorInfo::CreateAndPublish(const std::string& globalContext) const {
                 [] (char& c) { c = isalnum(c) ? c : '_'; });
 
   std::string val = std::to_string(fd);
-  add_environment(publishedName.c_str(), val.c_str());
+  setenv(publishedName.c_str(), val.c_str(), 1);
 
   // make sure we don't close on exec
   fcntl(fd, F_SETFD, 0);
diff --git a/init/init.cpp b/init/init.cpp
index d0afac11d..e1bd3a2cb 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -71,8 +71,6 @@ static char qemu[32];
 
 std::string default_console = "/dev/console";
 
-const char *ENV[32];
-
 static int epoll_fd = -1;
 
 static std::unique_ptr<Timer> waiting_for_prop(nullptr);
@@ -126,38 +124,6 @@ void register_epoll_handler(int fd, void (*fn)()) {
     }
 }
 
-/* add_environment - add "key=value" to the current environment */
-int add_environment(const char *key, const char *val)
-{
-    size_t n;
-    size_t key_len = strlen(key);
-
-    /* The last environment entry is reserved to terminate the list */
-    for (n = 0; n < (arraysize(ENV) - 1); n++) {
-
-        /* Delete any existing entry for this key */
-        if (ENV[n] != NULL) {
-            size_t entry_key_len = strcspn(ENV[n], "=");
-            if ((entry_key_len == key_len) && (strncmp(ENV[n], key, entry_key_len) == 0)) {
-                free((char*)ENV[n]);
-                ENV[n] = NULL;
-            }
-        }
-
-        /* Add entry if a free slot is available */
-        if (ENV[n] == NULL) {
-            char* entry;
-            asprintf(&entry, "%s=%s", key, val);
-            ENV[n] = entry;
-            return 0;
-        }
-    }
-
-    LOG(ERROR) << "No env. room to store: '" << key << "':'" << val << "'";
-
-    return -1;
-}
-
 bool start_waiting_for_property(const char *name, const char *value)
 {
     if (waiting_for_prop) {
@@ -429,8 +395,6 @@ int main(int argc, char** argv) {
         install_reboot_signal_handlers();
     }
 
-    add_environment("PATH", _PATH_DEFPATH);
-
     bool is_first_stage = (getenv("INIT_SECOND_STAGE") == nullptr);
 
     if (is_first_stage) {
@@ -439,6 +403,8 @@ int main(int argc, char** argv) {
         // Clear the umask.
         umask(0);
 
+        clearenv();
+        setenv("PATH", _PATH_DEFPATH, 1);
         // Get the basic filesystem setup we need put together in the initramdisk
         // on / and then we'll let the rc file figure out the rest.
         mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
diff --git a/init/init.h b/init/init.h
index 50a7c8352..b757c1d65 100644
--- a/init/init.h
+++ b/init/init.h
@@ -30,9 +30,7 @@ namespace init {
 // Note: These globals are *only* valid in init, so they should not be used in ueventd,
 // watchdogd, or any files that may be included in those, such as devices.cpp and util.cpp.
 // TODO: Have an Init class and remove all globals.
-extern const char *ENV[32];
 extern std::string default_console;
-
 extern std::vector<std::string> late_import_paths;
 
 Parser CreateParser(ActionManager& action_manager, ServiceList& service_list);
@@ -43,8 +41,6 @@ void property_changed(const std::string& name, const std::string& value);
 
 void register_epoll_handler(int fd, void (*fn)());
 
-int add_environment(const char* key, const char* val);
-
 bool start_waiting_for_property(const char *name, const char *value);
 
 void DumpState();
diff --git a/init/selinux.cpp b/init/selinux.cpp
index c8240286d..ef59164e3 100644
--- a/init/selinux.cpp
+++ b/init/selinux.cpp
@@ -48,7 +48,6 @@
 #include "selinux.h"
 
 #include <fcntl.h>
-#include <paths.h>
 #include <stdlib.h>
 #include <sys/wait.h>
 #include <unistd.h>
@@ -126,8 +125,7 @@ bool ForkExecveAndWaitForCompletion(const char* filename, char* const argv[]) {
         }
         TEMP_FAILURE_RETRY(close(pipe_fds[1]));
 
-        const char* envp[] = {_PATH_DEFPATH, nullptr};
-        if (execve(filename, argv, (char**)envp) == -1) {
+        if (execv(filename, argv) == -1) {
             PLOG(ERROR) << "Failed to execve " << filename;
             return false;
         }
diff --git a/init/service.cpp b/init/service.cpp
index 6ab60e3ca..de9538fbe 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -147,14 +147,6 @@ static void ExpandArgs(const std::vector<std::string>& args, std::vector<char*>*
     strs->push_back(nullptr);
 }
 
-ServiceEnvironmentInfo::ServiceEnvironmentInfo() {
-}
-
-ServiceEnvironmentInfo::ServiceEnvironmentInfo(const std::string& name,
-                                               const std::string& value)
-    : name(name), value(value) {
-}
-
 unsigned long Service::next_start_order_ = 1;
 bool Service::is_exec_service_running_ = false;
 
@@ -507,7 +499,7 @@ Result<Success> Service::ParseSeclabel(const std::vector<std::string>& args) {
 }
 
 Result<Success> Service::ParseSetenv(const std::vector<std::string>& args) {
-    envvars_.emplace_back(args[1], args[2]);
+    environment_vars_.emplace_back(args[1], args[2]);
     return Success();
 }
 
@@ -723,8 +715,8 @@ bool Service::Start() {
             SetUpPidNamespace(name_);
         }
 
-        for (const auto& ei : envvars_) {
-            add_environment(ei.name.c_str(), ei.value.c_str());
+        for (const auto& [key, value] : environment_vars_) {
+            setenv(key.c_str(), value.c_str(), 1);
         }
 
         std::for_each(descriptors_.begin(), descriptors_.end(),
@@ -779,7 +771,7 @@ bool Service::Start() {
 
         std::vector<char*> strs;
         ExpandArgs(args_, &strs);
-        if (execve(strs[0], (char**) &strs[0], (char**) ENV) < 0) {
+        if (execv(strs[0], (char**)&strs[0]) < 0) {
             PLOG(ERROR) << "cannot execve('" << strs[0] << "')";
         }
 
diff --git a/init/service.h b/init/service.h
index fe851299e..be173cd64 100644
--- a/init/service.h
+++ b/init/service.h
@@ -57,13 +57,6 @@
 namespace android {
 namespace init {
 
-struct ServiceEnvironmentInfo {
-    ServiceEnvironmentInfo();
-    ServiceEnvironmentInfo(const std::string& name, const std::string& value);
-    std::string name;
-    std::string value;
-};
-
 class Service {
   public:
     Service(const std::string& name, const std::vector<std::string>& args);
@@ -178,7 +171,7 @@ class Service {
     std::string seclabel_;
 
     std::vector<std::unique_ptr<DescriptorInfo>> descriptors_;
-    std::vector<ServiceEnvironmentInfo> envvars_;
+    std::vector<std::pair<std::string, std::string>> environment_vars_;
 
     Action onrestart_;  // Commands to execute on restart.